Math, asked by RSUNKALP, 11 months ago

Cos A =3/5 and cosB = 5/13 then cosA CosB + Sin a sin b =?

Answers

Answered by adinarayanakanta

2

Step-by-step explanation:

cosa=3/5,sina=4/5

cosb=5/13,sinb=12/13

=3/5×4/5+5/13×12/13=12/25+60/169=

2028+1500/4225=3528/4225

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