cos105.cos60-sin105.sin60=
MitheshShankar:
answer is -cos15
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yes use ASTC 180 - 165 then u willl get positive only
what is ASTC?
yes it is english wt u thght
ASTC-all sin tan cos
180- theta comes in second quadrant
not i first
not in first*
cos sec is nvr negitive
that is in a different case
https://ipfs.io/ipfs/QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1mXWo6uco/wiki/Trigonometric_functions.html
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