Question

cos 2 27 q - sin 2 63 q =​

Answer 1

Step-by-step explanation:

Given:

${cos}^{2} 27° - {sin}^{2} 63°$

To find: Find the value of given trigonometry expression.

Solution:

Tip: Formula Used

$cos \: \theta = sin(90° - \theta)$

Step 1: Put the formula in given expression

${sin}^{2} (90° - 27°) - {sin}^{2}63°$

Step 2: Solve subtraction

${sin}^{2} 63° - {sin}^{2} 63°$

Step 3: Cancel both

${sin}^{2} 63° - {sin}^{2} 63° = 0$

Final answer:

$\bold{{cos}^{2} 27° - {sin}^{2} 63° =0}$

Hope it helps you.

Remark*: Question was corrected before answer.

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