Question

Show that:-
Sin35° Sin55° - cos 35° cos55° = 0

Answer 1

Sin35° Sin55° - cos 35° cos55° = 0

LHS = Sin35° sin ( 90- 35)° - cos 35° cos (90-35)°

= Sin35° cos35° - cos 35° sin35°

= sin ( 35-35)°

= sin0° = 0 = RHS

Answer 2

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$\it\huge\mathfrak\red{Answer:-}$]

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=Sin35 *sin55 - cos35 * cos55

= sin(90-55)*sin(90-55) - cos35 * cos55

= cos35 *cos55 - cos35 *cos55= 0