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cos ^(2) 73^(circ)+cos ^(2) 47^(circ)+co...

` cos ^(2) 73^(circ)+cos ^(2) 47^(circ)+cos 73^(circ) . cos 47^(circ)=`

A

3

B

4

C

`(3)/(4)`

D

`(4)/(3)`

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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