Math, asked by ShrinivasKulkarni, 11 months ago

cos38cos8 + sin38sin8

Answers

Answered by shubham610

1

Step-by-step explanation:

$cos38cos38 + sin38sin38 \\ =cos {}^{2} 38 + sin {}^{2} 38 \\ = 38(cos {}^{2} + sin {}^{2} ) \\ = 38 \times 1 \\ = 38$

ShrinivasKulkarni: But the option are 1)cos30 2)cos60 3)cos45 4)cos38

shubham610: why u did not post options!, it not my fault,

ShrinivasKulkarni: sorry

ShrinivasKulkarni: please help me

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