HS.F.20(+).b
Prove the addition and subtraction formulas for sine, cosine and tangent and use them to solve problems.
Example Problems
Write the expression(s) that represent all solutions to the equation:
Your answer should be in radians; round any decimals to the nearest thousandth, if necessary. Use n to represent any integer.
Your answer should be in radians; round any decimals to the nearest thousandth, if necessary. Use n to represent any integer.
Write the expression(s) that represent all solutions to the equation:
Your answer should be in degrees; round any decimals to the nearest hundredth, if necessary. Use to represent any integer.
Your answer should be in degrees; round any decimals to the nearest hundredth, if necessary. Use to represent any integer.
Write the expression(s) that represent all solutions to the equation:
Your answer should be in degrees; round any decimals to the nearest hundredth, if necessary. Use to represent any integer.
Your answer should be in degrees; round any decimals to the nearest hundredth, if necessary. Use to represent any integer.
Khan Academy ResourcesTrig identity referenceUsing the trig angle addition identitiesFind trig values using angle addition identitiesTrig angle addition identitiesProof of the tangent angle sum and difference identitiesUsing trig angle addition identities: manipulating expressionsProof of the sine angle addition identityProof of the cosine angle addition identityUsing the tangent angle addition identityFinding trig values using angle addition identitiesUsing trig angle addition identities: finding side lengthsUsing the cosine angle addition identity
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